Jail-window



(No Model.)

D. MCDONALD.

' JAIL WINDOW.

Patented Dec. 13, 1887;

INVENTOR W TNESSES: (774/00 ATTORNEYS.

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V UNITED STATES PATENT OFFIcn.

DONALD MCDONALD, OF LOUISVILLE, KENTUCKY.

JAILV-W-INDOWL SPECIFICATION forming part of Letters Patent No. 374,800,'dated December 13, 1887.

Application filed October 11, 1887. Serial No. 252,095. (No model.)

To all whom it may concern.- V Be it known that I, DONALD ll/ICDONALD, of Louisville, in the county of Jefferson and State of Kentucky, have invented a new and useful Improvement in Jail-Windows, of which the following is a specification.

The invention relates to the windows of stone jails.

Heretofore such windows have been made by standing large stones on end at intervals of about five inches, thus giving an openinglarge enough to admit light and air, but too small to allow the escape of prisoners. This construction is defective on account of the fact that tools and other things could be handed in to the prisoners through such openings, and on account of the further fact that when one of the upright stones was pushed over against the other an opening was inadelarge enough for a man to pass through. Both of these objections I obviate as follows, reference being had to the accompanying drawings, on which similarletters of reference indicate like parts.

Figure 1 is an elevation of the jail-window from the inside. Fig. 2 is an enlarged partial plan with the lintel Eremoved and the window-frame in section. Fig. 3 is a vertical section through one of the window-frames.

The slits or windows are made by standing the stones A A on end and pinning them securely by dowel-pins a to thelintel E and the sill D. Before these stones are set, channels a c are cut in them, thus forming a check, into which the flanges of frames F are slipped bemade of strong wire or small iron bars closely woven into stout iron frames F.

It is' obvious that as long as these gratings remain unbroken nothing larger than their meshes can be passed in through the windows, and at the same time it is impossible to. move one of the stones any nearer tothe other, as the-grating-frames prevent such motion.

S is a series of small metal sashes hung in the iron frame F, set in the openings, the wires being set far enough to one side to allow room for the iron sash. 'lhe sashes are hung from the top, are connected together by a rod, 1", and are. operated by a string, t, reaching inside, so that they can be opened and closed by the prisoners.

This device has the following advantages:

fore the lintel E is set. The gratings B B are 5 First, the sash can be opened and closed by the hinged or swinging sash S, with connectingrod 1' and operating-cord t, substantially as and for the purpose described.

. DONALD MCDONALD. \Vitnesses:

WILLIAM J ARVIS, CHAS. A. WILSON. 

